Blast gun



FIG. 1 is a right side view of a blast gun showing my new design;

FIG. 2 is a rear view of the blast gun of FIG. 1;

FIG. 3 is a front view of the blast gun of FIG. 1;

FIG. 4 is a left side view of the blast gun of FIG. 1;

FIG. 5 is an inverted plan view of the gun shown in FIG. 4;

FIG. 6 is a plan view of the blast gun shown in FIG. 1;

FIG. 7 is a bottom perspective view of the blast gun of FIG. 1; and,

FIG. 8 is a top/rear perspective view of the blast gun.

The ornamental design for a blast gun, as shown and described.